Animated Lava

Author: gam0022

.idea/.idea.unity-demoscene/.idea/contentModel.xml

@@ -3,7 +3,7 @@
 --- !u!114 &11400000
 MonoBehaviour:
   m_ObjectHideFlags: 0
-  m_PrefabParentObject: {fileID: 0}
+  m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInternal: {fileID: 0}
   m_GameObject: {fileID: 0}
   m_Enabled: 1
@@ -53,4 +53,4 @@ MonoBehaviour:
   conditionsFolded: 0
   variablesFolded: 0
   materialsFolded: 0
-  constantsFolded: 1
+  constantsFolded: 0

Assets/Demoscene/Projects/2018-07-12-Lava/Lava.asset

@@ -4,7 +4,7 @@
 Material:
   serializedVersion: 6
   m_ObjectHideFlags: 0
-  m_PrefabParentObject: {fileID: 0}
+  m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInternal: {fileID: 0}
   m_Name: Lava
   m_Shader: {fileID: 4800000, guid: 5c314efc8c9d8449ab45d6dd0183c06e, type: 3}
@@ -17,15 +17,21 @@ Material:
   disabledShaderPasses: []
   m_SavedProperties:
     serializedVersion: 3
-    m_TexEnvs: []
+    m_TexEnvs:
+    - _Noise:
+        m_Texture: {fileID: 2800000, guid: e80c3c84ea861404d8a427db8b7abf04, type: 3}
+        m_Scale: {x: 1, y: 1}
+        m_Offset: {x: 0, y: 0}
     m_Floats:
+    - _FlowIntensity: 0.32
+    - _FlowSpeed: 0.5
     - _Loop: 99.2
     - _MinDistance: 0.01
     - _Power: 0.038
     - _ShadowExtraBias: 0.802
     - _ShadowLoop: 10
     - _ShadowMinDistance: 0.01
-    - _Threshold: 1.38
+    - _Threshold: 1.267
     m_Colors:
     - _Diffuse: {r: 0.9528302, g: 0.004494493, b: 0.004494493, a: 1}
     - _Emission: {r: 0, g: 0, b: 0, a: 0}

Assets/Demoscene/Projects/2018-07-12-Lava/Lava.mat

@@ -16,10 +16,12 @@ Properties
     _ShadowExtraBias("Shadow Extra Bias", Range(0.0, 1.0)) = 0.01
 
 // @block Properties
-// _Color2("Color2", Color) = (1.0, 1.0, 1.0, 1.0)
-_Threshold("Threshold", Range(1.0, 2.0)) = 0.5
 _Power("Power", Range(0.0, 1.0)) = 0.5
 [HDR] _Lava("Lava", Color) = (1.0, 0.0, 0.0, 1.0)
+_Noise("Noise", 2D) = "gray" {}
+_Threshold("Threshold", Range(1.0, 2.0)) = 0.5
+_FlowIntensity("Flow Intensity", Range(0.0, 1.0)) = 0.2
+_FlowSpeed("Flow Speed", Range(0.0, 5.0)) = 0.2
 // @endblock
 }
 
@@ -46,9 +48,9 @@ CGINCLUDE
 #include "Assets/uRaymarchingCustom/Common.cginc"
 
 // @block DistanceFunction
+#include "Assets/Demoscene/Shaders/Includes/Common.cginc"
 #include "Assets/Demoscene/Shaders/Includes/Noise.cginc"
 
-float _Threshold;
 float _Power;
 
 inline float DistanceFunction(float3 pos)
@@ -69,9 +71,67 @@ inline float DistanceFunction(float3 pos)
 
 // @block PostEffect
 float4 _Lava;
+sampler2D _Noise;
+float _Threshold;
+float _FlowIntensity;
+float _FlowSpeed;
+
+// https://www.shadertoy.com/view/lslXRS
+float noise( in vec2 x ){
+    return tex2D(_Noise, x*.01).x;
+}
+
+vec2 gradn(vec2 p)
+{
+	float ep = .09;
+	float gradx = noise(vec2(p.x+ep,p.y))-noise(vec2(p.x-ep,p.y));
+	float grady = noise(vec2(p.x,p.y+ep))-noise(vec2(p.x,p.y-ep));
+	return vec2(gradx,grady);
+}
+
+float lavaFlow(in vec2 p)
+{
+	float z=2.;
+	float rz = 0.;
+	vec2 bp = p;
+	for (float i= 1.; i < 3.; i++)
+	{
+		//primary flow speed
+		p += _Time.y * .6 * _FlowSpeed;
+
+		//secondary flow speed (speed of the perceived flow)
+		bp += _Time.y * 1.9 * _FlowSpeed;
+
+		//displacement field (try changing _Time.y multiplier)
+		vec2 gr = gradn(i*p*.34 + _Time.y * 1.);
+
+		//rotation of the displacement field
+		// gr *= rotateMat(_Time.y * 6.-(0.05 * p.x + 0.03 * p.y) * 40.);
+		gr = mul(rotateMat(_Time.y * 6.-(0.05 * p.x + 0.03 * p.y) * 40.), gr);
+
+		//displace the system
+		p += gr*.5;
+
+		//add noise octave
+		rz+= (sin(noise(p) * 7.) * 0.5 + 0.5) / z;
+
+		//blend factor (blending displaced system with base system)
+		//you could call this advection factor (.5 being low, .95 being high)
+		p = mix(bp, p, .77);
+
+		//intensity scaling
+		z *= 1.4;
+		//octave scaling
+		p *= 2.;
+		bp *= 1.9;
+	}
+	return rz;
+}
+
 inline void PostEffect(RaymarchInfo ray, inout PostEffectOutput o)
 {
-    o.emission = step(ray.endPos.y, _Threshold) * _Lava;
+    o.emission = step(ray.endPos.y, _Threshold + _FlowIntensity * lavaFlow(ray.endPos.xz)) * _Lava;
+    // o.emission = lavaFlow(ray.endPos.xz) * _Lava;
 }
 // @endblock
 

Assets/Demoscene/Projects/2018-07-12-Lava/Lava.shader

@@ -333,13 +333,13 @@ Transform:
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInternal: {fileID: 0}
   m_GameObject: {fileID: 1896176113}
-  m_LocalRotation: {x: 0.13516438, y: 0.8623384, z: -0.3079131, w: 0.37854007}
-  m_LocalPosition: {x: -0, y: 6.4, z: 0}
+  m_LocalRotation: {x: 0.28891098, y: 0.020202622, z: -0.066766895, w: 0.9548112}
+  m_LocalPosition: {x: -0, y: 6.13, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 0
-  m_LocalEulerAnglesHint: {x: 39.3, y: 132.6, z: 0}
+  m_LocalEulerAnglesHint: {x: 33.67, y: 0, z: -8}
 --- !u!1 &1943384519
 GameObject:
   m_ObjectHideFlags: 0

Assets/Demoscene/Projects/2018-07-12-Lava/Lava.unity

@@ -0,0 +1,11 @@
+#ifndef __COMMON__
+#define __COMMON__
+
+float2x2 rotateMat(float theta)
+{
+    float c = cos(theta);
+    float s = sin(theta);
+    return float2x2(c, -s ,s, c);
+}
+
+#endif